Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 49, Issue 1, Pages 17-26Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998313514257
Keywords
Wood-plastic composites; recycled polypropylene; rubberwood flour; mixture experimental design; creep behavior
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Funding
- graduate school of Prince of Songkla University
- Government budget Fund [2555A11502062]
- Rubberwood Technology and Management Research Group of Faculty of Engineering, Prince of Songkla University, Thailand [ENG-54-27-11-0137-S]
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Composites of rubberwood flour (RWF) and recycled polypropylene (rPP) were produced into panel samples by using a twin-screw extruder. The effects on creep behavior of mixture fractions of rPP, RWF, maleic anhydride-grafted polypropylene (MAPP), and ultraviolet (UV) stabilizer were studied in a D-optimal mixture design. Creep was significantly affected by the composition. Increasing the fraction of RWF decreased creep, while MAPP and UV stabilizer increased it. The models fitted were used to optimize a desirability score that balanced multiple creep characteristics. The model-based optimal formulation 50.5wt% rPP, 44.9wt% RWF, 3.5wt% MAPP, 0.1wt% UV stabilizer, and 1.0 wt% lubricant was experimentally validated to have low creep closely matching the model predictions.
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